Post a New Topic
Original post made
on Apr 5, 2012
TCE was used in cleaning circuit boards. Fairchild, anyone?
The TCE plumes on both sides of 101 are well mapped and understood, as are the directions of their movements. The plume under Orion Park is not from the semiconductor manufacturers that used to operate on the other side of 101.
Is this a new plume? The existing plume map(s) that I have seen didn't show anything in the Orion Park area.
The plume was on the base itself. Actually running right under Hangar 1. (Another reason not to save that white elephant).
Let us keep incidents like this in mind when we plan new development. Thorough environmental impact studies are important. You can probably break ground on a new project quicker if you don't do one. But cleaning up after the fact is almost always more expensive and contentious than not polluting in the first place.
Fairchild, Intel and Raytheon had semiconductor manufacturing operations (not actually using TCE for circuit board cleaning, but similar) in the area of Middlefield-Ellis-Whisman (MEW) that was under EPA Superfund supervision in the 1980s. Extensive long-term remediation projects began then - soil excavation and aeration, walls deep underground around sites with extraction systems, and so forth. The good news is that the companies took responsibility and that the TCE had not reached any drinking water supply wells. The MEW "merged plume" was known to head under 101 towards Moffett, where there was evidence of an underground concentration of TCE from washing off airplanes and so forth. Because the subsurface hydrogeology in the MEW area is very jumbled, and there were multiple sources there and at Moffett, it was not possible to depict the clear flow of materials in distinct streams. Nevertheless, as Old Ben notes, there were reasonable maps of where the stuff from any one source was heading. It was widely speculated that some day the amount of stuff under and likely around Moffett would get more attention, which seems to be the case as various land repurposing projects come along.
Don't miss out on the discussion!
Sign up to be notified of new comments on this topic.
Post a comment
Posting an item on Town Square is simple and requires no registration. Just complete this form and hit "submit" and your topic will appear online.
Please be respectful and truthful in your postings so Town Square will continue to be a thoughtful gathering place for sharing community information
We prefer that you use your real name, but you may use any "member" name you wish.
Select your neighborhood or school community: * Not sure?
- Bailey Park
- Blossom Valley
- Castro City
- Cuesta Park
- Jackson Park
- Monta Loma
- North Bayshore
- North Whisman
- Old Mountain View
- Rengstorff Park
- Rex Manor
- Shoreline West
- St. Francis Acres
- Stierlin Estates
- Sylvan Park
- The Crossings
- Waverly Park
- Whisman Station
- another community
Verification code: *
Enter the verification code exactly as shown, using capital and lowercase letters, in the multi-colored box.
I Told My Mom She's Dying
By Chandrama Anderson | 10 comments | 2,167 views
Grab a Bowl of Heaven soon in Mountain View
By Elena Kadvany | 0 comments | 1,156 views
Fancy Fast and Fun!
By Laura Stec | 3 comments | 684 views
Quick Check List for UC Applications
By John Raftrey and Lori McCormick | 0 comments | 558 views
Home & Real Estate
Shop Mountain View
Send News Tips
Circulation & Delivery
Palo Alto Online
© 2014 Mountain View Online
All rights reserved.